The eV-scale sterile neutrino has been proposed to explain some anomalous results in experiments,such as the deficit of reactor neutrino fluxes and the excess of $\bar{\nu}_\mu\to\bar{\nu}_e$ in LSND. This hypothesis can be tested by future core-collapse supernova neutrino detection independently since the active-sterile mixing scheme affects the flavor conversion of neutrinos inside the...
The latest data of the two long-baseline accelerator experiments NO$\nu$A and T2K, interpreted in the standard 3-flavor scenario, display a tension. A mismatch in the determination of the standard CP-phase $\delta_{\mathrm {CP}}$ extracted by the two experiments is evident in the normal neutrino mass ordering. While NO$\nu$A prefers values close to $\delta_{\mathrm {CP}} \sim 0.8 \pi$, T2K...
Neutrino interactions with nuclei are the main experimental tool used to study neutrinos in many different contexts, and systematic uncertainties arising from neutrino-nucleus interactions, especially those related to nuclear effects, can be a limiting factor in their energy reconstruction. For the CC1pi interaction, which is dominated by resonant production, physics of the initial state...
Core-collapse supernovae are among the most magnificent events in the observable universe. They produce many of the chemical elements necessary for life to exist and their remnants—neutron stars and black holes—are interesting astrophysical objects in their own right. However, despite millennia of observations and almost a century of astrophysical study, the explosion mechanism of...
The detection of neutrinos through Coherent Elastic Neutrino Nucleus Scattering (CE$\nu$NS) process opens a new window to study the fundamental properties of this elusive particle and to probe physics beyond the Standard Model. The CONUS experiment – operational since April 2018 – is located at 17$\,$m from the 3.9$\,$GW$_{\text{th}}$ core of the nuclear power plant Brokdorf (Germany) and aims...
The phenomenon of Neutrino Oscillation has been very well confirmed by a plethora of data; we are now entering a precision era in which the mixing angles and mass differences are going to be measured with unprecedented precision by ongoing and planned experiments. However, the new measurements could reveal that the standard three flavor scenario is not enough for a complete description of...
The XENONnT detector recently started its commissioning phase at Laboratori Nazionali del Gran Sasso. Utilizing 5.9 tonnes of liquid xenon (LXe) as active target and designed for a high level of background reduction, it will greatly improve the results of its predecessor, XENON1T. Although primarily a dark matter (DM) detector whose main channel is the direct detection of Weakly Interacting...
Ultra High Energy neutrinos may represent a unique opportunity
to unveil possible new physics interactions in the neutrino sector. At
this regard, we have investigated the effects on high and ultrahigh energy
active neutrino fluxes due to active-sterile secret interactions mediated
by a new pseudoscalar particle. These interactions become relevant at
very different energy scales...
The “solar metallicity problem” is one of the most long-standing puzzles in solar physics. It consists in the discrepancy between several Sun physical properties predicted by solar models using updated metal abundances from spectroscopy (low-metallicity scenario, LZ-SSM), and those inferred from helioseismology, which favours a higher metal content (high-metallicity scenario, HZ-SSM). The...
Hadron production measurements are crucial for helping long-baseline
neutrino oscillation experiments constrain their beam flux
uncertainties. These uncertainties represent a leading systematic
uncertainty on measured neutrino oscillation parameters. At the
NA61/SHINE experiment, interactions of charged hadrons with various
materials relevant to neutrino production are recorded and...
Recently the first direct observation of CNO neutrinos was achieved with a high statistical significance. This challending observation was made using the highly radiopure liquid-scintillator detector Borexino located in the Laboratori Nazionali del Gran Sasso in Italy. The spectral shape of CNO neutrino interactions in the liquid scintillator of the Borexino detector is very similar to that of...
Neutrino oscillations occur due to non-zero masses and they are believed to maintain quantum coherence even over astrophysical length scales.It is thus natural to explore geometric aspects of the phases involved as well as think about quantification of the coherence properties of neutrinos via temporal correlations in the form of Leggett-Garg Inequalities (LGI). In this paper, we study the...
The goal of the presented analysis is the measurement of the muon antineutrino single $\pi^{-}$ production interactions on CH ($\bar\nu_{\mu} + N \rightarrow \mu^{+} + \pi^{-} + X$) in the T2K off-axis near detector. This interaction mode is the second largest at T2K energies and studies are ongoing to include such events in T2K oscillation analysis which for $\bar\nu_{\mu}$ beam mode is...
Borexino is an experiment designed and constructed for real-time detection of low energy solar neutrinos. It is installed at the underground Laboratori Nazionali del Gran Sasso (L’Aquila, Italy) and started taking data in May 2007. Today, the detector is characterized by an extreme and unique radiopurity. The Borexino collaboration has recently published the first direct measurement of the CNO...
Electron-neutrino appearance is a crucial channel for searches of sterile neutrinos in short-baseline experiments and measurements of Charge-Parity (CP) violation in long-baseline oscillation experiments. The precise knowledge of the electron neutrino cross section will, therefore, play a key role in reducing the uncertainties of these future experiments. There are only a handful of electron...
We calculate the rates of radiative $\beta^- \to \alpha^- + \gamma$ decays for $(\alpha, \beta) = (e, \mu)$, $(e, \tau)$ and $(\mu, \tau)$ by taking the {\it unitary} gauge in the $(3+n)$ active-sterile neutrino mixing scheme, and make it clear that constraints on the unitarity of the $3\times 3$ Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix $U$ extracted from $\beta^- \to \alpha^- + \gamma$...
Neutrino interactions off correlated nucleon pairs (2p2h interactions) are thought to contribute significantly to events detected by long baseline neutrino oscillation experiments. These 2p2h processes are challenging to model and the corresponding uncertainties can be responsible for some of the leading systematic uncertainties in measurements of neutrino oscillation parameters. To help...
Solar neutrino experiments have had great success in furthering our understanding of the neutrino sector and the Sun. Experiments like BOREXINO, KamLAND, and SuperKamiokande are also sensitive to antineutrino fluxes at the level of sub per-mille of the B8 neutrino flux. We explore this in our work to derive constraints on a model of decaying sterile neutrinos, recently proposed as a solution...
In this talk, I will explore a surprising connection between speculative issues in elementary particle physics and the Sun. I will show how the extreme sensitivity of nuclear reaction Coulomb barrier penetration at the low energies of the solar core and the recent observation of the CNO neutrinos from the Sun by the Borexino collaboration could be leveraged to probe aspects of the non-standard...
The MicroBooNE detector has an active mass of 85 tons of liquid argon and is located along the Booster Neutrino Beam (BNB) at Fermilab. It has a rich physics program including the search for a low-energy excess observed at MiniBooNE and measurements of neutrino-Argon interaction cross sections. In this talk, we present a procedure, based on the Wiener-SVD unfolding method, to extract the...
Observation of Supernovae through their neutrino emission is a major fundamental point to understand both supernovae dynamics and neutrino physical properties. JUNO is a multi- purpose neutrino experiment with a 20 kton liquid scintillator detector under construction in Jiangmen, China. The main aim of the experiment is to determine neutrino mass hierarchy by precisely measuring the energy...
In this talk, I summarize the investigation revolving around neutrino physics within the framework of extended theories of gravity. By relying on the covariant reformulation of Pontecorvo’s formalism, one can evaluate the oscillation probability of neutrinos propagating in static spacetimes described by gravitational actions quadratic in the curvature invariants. In particular, it is shown...
We explore the evolution of a select grid of solar metallicity stellar models from their pre-main sequence phase to near their final fates in a neutrino Hertzsprung-Russell diagram, where the neutrino luminosity replaces the traditional photon luminosity. Using a calibrated MESA solar model for the solar neutrino luminosity ($L_{\nu,\odot}$ = 0.02398 $\cdot$ $L_{\gamma,\odot}$ = 9.1795...
Neutrinos have played a key role in astrophysics, from the characterization of nuclear fusion processes in the Sun to the observation of supernova SN1987A and multiple extragalactic events. The Super-Kamiokande experiment has played a major part in past in these astrophysical studies by investigating low energy O(10)MeV neutrinos and currently exhibits the best sensitivity to the diffuse...
We all know that in the dense anisotropic interior of the star, neutrino- neutrino forward-scattering can lead to fast collective neutrino oscillations, which has striking consequences on flavor dependent neutrino emission and can be crucial for the evolution of a supernova and its neutrino signal. Although the triggering and initial growth of fast oscillations are understood, owing to its...
The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a 26-ton Gd-doped water Cherenkov detector installed in the Booster Neutrino Beam (BNB) at Fermilab. The primary physics goal of ANNIE is to measure the neutron yield from νμ interactions as a function of Q2 in order to constrain neutrino-nucleus interaction theoretical models. Identifying and counting final state neutrons...
We study the connection between the two indications of physics beyond the Standard Model (SM): the masses and mixing of neutrinos and the existence of dark matter (DM). The most attractive proposal for the origin of neutrino mass, the type I seesaw mechanism, can also account for matter-antimatter asymmetry via leptogenesis. We show that a minimal extension of type I seesaw models can also...
While the galactic core is 25,000 light years away but the number of stars there is immense making it the 2nd brightest neutrino source in the sky other than our Sun. The collection power of a gravitational Lens using our Sun is the most efficient way to focus this and unlike the light gravitational lens at 500 AU since the neutrino has mass its expected location is 20 to 40 AU, reachable with...
I will discuss our recent work on a simple scoto-seesaw model that accounts for dark matter and neutrino masses with spontaneous CP violation. This is achieved with a single horizontal $\mathcal{Z}_8$ discrete symmetry, broken to a residual $\mathcal{Z}_2$ subgroup responsible for stabilizing dark matter. CP is broken spontaneously via the complex vacuum expectation value of a scalar singlet,...
MINERvA is a neutrino scattering experiment at Fermilab that utilizes the intense neutrino beam from the NuMI beamline and a finely segmented scintillator-based tracking detector to measure neutrino cross sections and study nuclear effects with various nuclear targets. MINERvA has results using both its low- energy and medium energy data sets. These results cover both exclusive and inclusive...
The Sudbury Neutrino Observatory experiment (SNO) has performed a variety of measurements of neutrino and cosmic ray interactions, including the first observation of solar neutrino flavor change that confirmed that neutrinos have mass. Several new analyses using the SNO dataset collected between 1999 and 2006 have recently been completed, including tests of Lorentz invariance, constraints on...
Determining the leptonic CP-violation is one of the main objectives of the neutrino oscillation experiments. Long-baseline (LBL) experiments are expected to play a crucial role in this direction. Two LBL experiments T2K and NO$\nu$A are already playing a leading role in addressing this issue. Apart from this, a few highly sophisticated LBL experiments like DUNE, T2HK, and ESS have also been...
The T2K neutrino experiment in Japan started data taking in 2010 and obtained a first indication of CP violation in neutrino oscillations. To obtain better sensitivity, T2K will accumulate more statistics with a higher intensity beam and an upgraded near detector. The upgraded off-axis near detector (ND280) will allow us to reduce systematic uncertainties in the number of predicted...
We analyze the effects of a Violation of Equivalence Principle (VEP) on neutrino oscillations, focusing on the recently released IceCube data on atmospheric neutrino fluxes. We obtain the strongest constraints up to date on the parameter space of VEP in the context of neutrino physics with a benchmark choice for the coupling between neutrinos and gravitational field. We also study the effect...
SND@LHC is a proposed, compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in an hitherto unexplored pseudo-rapidity region of 7.2<$\eta$<9.6, complementary to all the other experiments at the LHC. The experiment is to be located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on an 800 kg target...
Active galactic nuclei (AGN) are among the most promising neutrino source candidates, because of their potential to accelerate cosmic rays and also because of the dense photon fields present in their relativistic jets. In support of this hypothesis, IceCube has already observed several high-energy events from the direction of known blazar AGN like TXS 0506+056 and, more recently, PKS 1502+106....
The atmospheric neutrino flux represents a continuous source that can be exploited to infer properties about Cosmic Rays and neutrino oscillation physics. The JUNO observatory, a 20 kt liquid scintillator (LS) currently under construction in China, will be able to detect atmospheric neutrinos down to lower energies, with respect to Cherenkov detectors, given the large fiducial volume and the...
The Future Circular Collider (FCC) is proposed as a post-LHC particle collider at CERN and consists of different steps. The first step of the FCC (FCC-ee) is a high-luminosity, high-precision lepton collider located in the same tunnel as a possible precursor to a hadron collider, and complementary to it. The ultimate goal, FCC-hh, is a 100 TeV hadron collider, colliding protons and...
Gamma-Ray Bursts (GRBs) are among the brightest transients in our universe. Given the large amount of energy they release they have been long discussed as sources of ultra-high-energy cosmic rays (UHECR) - A hypothesis which is challenged by current IceCube neutrino limits. Assuming GRBs to power the UHECR flux, we study different engine realisations in multi-collision internal shock models...
Upon the neutrino discovery by Reines & Cowan (1956), they also paved the ground behind much of today’s neutrino detection technology. Large instrumented volumes for neutrino detection have been achieved via a key (implicit) principle: detection medium transparency and/or high purity. Much of that technology has yielded historical success, including several Nobel prizes, where the discovery of...
Ultra-high-energy cosmic rays (UHECRs) interact with pervasive photons during propagation. These interactions produce neutrinos, which can provide valuable insights on the elusive sources of UHECRs as well as on the composition of the highest-energy radiation. In this talk I will present realistic predictions for this cosmogenic flux, obtained through fits to UHECR measurements. In light of...
We investigate the sensitivity of electron-proton (ep) colliders for charged lepton flavor violation (cLFV) in an effective theory approach, considering a general effective Lagrangian for the conversion of an electron into a muon or a tau via the effective coupling to a neutral gauge boson or a neutral scalar field. For the photon, the Z boson and the Higgs particle of the Standard Model, we...
Blazars are a subclass of active galactic nuclei (AGNs) that have a relativistic jet with a small viewing angle towards the observer. Recent results based on hadronic scenarios have motivated an ongoing discussion of how a blazar can produce high energy neutrinos during a flaring state and which scenario can successfully describe the observed gamma-ray behavior. Markarian 421 (Mrk 421) is one...
Euclid is a European Space Agency mission on satellite, whose aim is to investigate the so called “dark universe” (that is, dark matter and dark energy) and thus strongly constrain the main cosmological parameters, including the sum of neutrino masses. For this purpose, an extensive calibration of all the telescope elements is required. I’ve worked on the in-flight flux calibration procedure...
The Taishan Antineutrino Observatory (JUNO-TAO) is a ton-level liquid scintillator detector at 30-35 meters from the Taishan reactor and it is a satellite detector of the JUNO Observatory.
It aims to measure the reactor neutrino spectrum and to provide model independent inputs for the neutrino mass hierarchy. To reach an energy resolution better than 2%, the scintillation light produced in...
A small fraction of GRBs with available data down to soft X-rays ( ~0.5 keV) have been shown to feature a spectral break in the low energy part of their prompt emission spectrum. The overall spectral shape is consistent with optically thin synchrotron emission from a population of marginally fast cooling particles. If the radiating particles are electrons, this interpretation implies...
JUNO is a 20 kt liquid scintillator detector under construction in Jiangmen, China, whose goal is to determine the neutrino mass hierarchy. Decay of radioactive isotopes in the liquid scintillator can mimic neutrino signal events. In order to meet the stringent requirements on the radiopurity of the liquid scintillator in JUNO experiment, the OSIRIS pre-detector is being designed to monitor...
The preference of the normal neutrino mass ordering from the recent cosmological constraint and the global fit of neutrino oscillation experiments does not seem like a wise choice at first glance since it obscures the neutrinoless double beta decay and hence the Majorana nature of neutrinos. Contrary to this naive expectation, we point out that the actual situation is the opposite. The normal...
Future neutrino observatories, like the Deep Underground Neutrino Experiment (DUNE),
will be sensitive to supernovae and solar neutrinos of low energies. These neutrinos offer a unique
look inside stars and stellar explosions. Inside the DUNE liquid argon time projection chamber,
low-energy electron neutrinos will produce visible electrons. In this talk, we will present a
preliminary study...
Neutrinos are puzzling particles that could answer many of the open questions about our Universe. Unlike any other observed particle, the flavor of neutrinos can feedback into itself in a neutrino-dense astrophysical environment. Such neutrino self-interaction leads to intriguing “fast” flavor conversions that can develop within a few nanoseconds in the core of core-collapse supernovae and...
We study the properties of the Cabibbo suppressed quasielastic production of $\Lambda$ and $\Sigma$ hyperons in antineutrino interactions with nuclei using the NuWro Monte Carlo generator. Few events of this kind have been observed in previous experiments and the model is built exploiting the SU(3) quark flavour symmetry. We study the results of introducing symmetry breaking and the second...
In this presentation the novel phenomenon of heavy neutrino-antineutrino oscillations is discussed as well as the QFT framework to describe it. Easy to implement formulae are presented which can be used to obtain the expected rate of lepton number conserving/violating displaced vertex events at colliders and the feasibility to observe oscillations for different models.
Several theories of particle physics beyond the Standard Model consider that neutrinos can decay. I discuss the sensitivity of the upcoming neutrino telescope KM3NeT-ORCA to this scenario. I show that it could improve the current bounds coming from oscillation experiments, where three-neutrino oscillations have been considered, by roughly two orders of magnitude. I also discuss the robustness...
Recent neutrino oscillation experiments have ushered in a new era with precisionmeasurements employed in the search for CP violation and mass hierarchy. The Deep UndergroundNeutrino Experiment (DUNE) is a next generation long-baseline neutrino experiment hosted by the U.S. Department of Energy's Fermilab. The single-phase liquid argon far-detector prototype (ProtoDUNE-SP) at the CERN neutrino...
The ESS neutrino Super Beam project (ESS$\nu$SB) aims at the production of an intense neutrino beam by using the 5 MW average power proton beam from the ESS facility currently under construction in Lund (Sweden). In the present work, we show the results of the Genetic Algorithm applied to the design of the ESS$\nu$SB target station. The impact of this optimization method on the physics reach...
Starburst Galaxies are known as “reservoirs” of high-energy cosmic rays which potentially could contribute to the astrophysical diffuse neutrino flux measured by IceCube. In this work, we go beyond the standard prototype-based approach, and investigate a model based on a data-driven blending of spectral indexes, thereby capturing the observed changes in the properties of individual emitters....
China is currently seeing a rise of underground laboratories and particle accelerators on its mainland. In this talk, we discuss the prospects of building a next-generation accelerator-based neutrino oscillation experiment by utilizing the laboratory sites that are available in China. We consider the potential candidates for the neutrino beam and detector facilities and examine their...
After the successful experimental confirmation of the phenomenon of neutrino oscillation, the major goal of the neutrino experiments has mainly shifted to the search for leptonic CP-violation (CPV), determination of neutrino mass ordering and the precision measurement of the oscillation parameters.
Leptonic CPV, if it can be established, can offer a crucial ingredient in explaining the...
Neutrino decay modifies neutrino propagation in a unique way; not only is there flavor changing as there is in neutrino oscillations, there is also energy transport from initial to final neutrinos. The most sensitive direct probe of neutrino decay is currently IceCube which can measure the energy and flavor of neutrinos traveling over extragalactic distances. For the first time we calculate...
The main goals of the Deep Underground Neutrino Experiment (DUNE) are to measure CP violation in the lepton sector, to make precise measurements of neutrino oscillation parameters, to observe supernova burst neutrinos and to detect rare processes such as proton decay. To fulfill these goals, DUNE will use a highly capable suite of near detectors that work together to constrain flux and cross...
In this talk I will discuss the calculation of neutrino oscillations in the early Universe and of the neutrino thermalization, quantified in particular by the effective number of neutrinos (Neff). Precision calculations of Neff are important in light of the future improvements in the experimental determinations. I will briefly review the state-of-art numerical results and discuss the...
Neutrino oscillations in the early Universe are commonly assumed to preserve homogeneity and isotropy. However, we know that collective oscillations can break both in the environments of supernovae and neutron star mergers. In this talk I will describe the conditions under which homogeneity and isotropy are broken by neutrino oscillations in the early Universe, and I will demonstrate how this...
The combination of recent developments in liquid scintillator, photodetection technology, and reconstruction techniques have made possible the concept of a large-scale neutrino detector that can distinguish Cherenkov and scintillation light. THEIA is a proposed multi-kton experiment that would be pioneering in exploiting the innovative concept of hybrid optical detectors, with the potential to...
The next generation of neutrino telescopes, including Baikal-GVD, KM3NeT, P-ONE, TAMBO, and IceCube-Gen2, will be able to determine the flavor of high-energy astrophysical neutrinos with 10% uncertainties. With the aid of future neutrino oscillation experiments --- in particular JUNO, DUNE, and Hyper-Kamiokande --- the regions of flavor composition at Earth that are allowed by neutrino...
The ESA Euclid mission will map the cosmic web with unprecedented precision. Among the main scientific objectives of Euclid one stands out for its interdisciplinary impact: the measurement of the sum of neutrino masses.
In this talk I will highlight the challenges that cosmology will have to face in order to exploit the accuracy of Euclid data, and achieve this groundbreaking result. I will...
The Glashow resonance, which corresponds to the production of a W boson from the resonant interaction between a high-energy electron antineutrino and an electron at rest, offers us a unique signature to disentangle electron antineutrinos from the total high-energy astrophysical neutrino flux. Identification of neutrino flavors in neutrino telescopes is important to the study of production...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation liquid scintillator reactor neutrino experiment being built in the Guangdong province in China. JUNO is a multi-purpose experiment with a wide range of applications in neutrino physics, ranging from a mass-ordering determination to solar, geo, and atmospheric neutrino measurements, to detecting supernovae. Moreover JUNO...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double-beta (0νββ) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. Following the completion...
In the constrained sequential dominance (CSD), tri-bimaximal mixing (TBM) pattern of the neutrino sector has been explained, by proposing a certain Yukawa coupling structure for the right-handed neutrinos of the model. However, from the current experimental data it is known that the values of the neutrino mixing angles are deviated from the TBM values. In order to explain this neutrino mixing,...
KamLAND-Zen 800 is a neutrinoless double-beta decay search experiment with the Kamioka Liquid-scintillator Anti-electron Neutrino Detector (KamLAND). In 2019, we started KamLAND-Zen 800 experiment with 745 kg of xenon. We achieved the background reductions by reducing the radioactive materials in the newly fabricated 25-μm-thick nylon film container for the Xe-loaded LS and developing a new...
We perform a thermal unflavored leptogenesis analysis on minimal left-right symmetric models in which the left-right symmetry is identified as generalized parity or charged conjugation. When left-right symmetry is unbroken in lepton Yukawa sector, the neutrino Dirac coupling matrix is completely determined by neutrino masses and mixing angles, which allows CP violation needed to generate...
Super-Kamiokande (SK) is a 50-kton water Cherenkov detector, instrumented with ∼13k photomultipliers and running since 1996. It is sensitive to neutrinos with energies ranging from 4.5 MeV to several TeV. A new framework has been developed for the follow-up of gravitational wave (GW) alerts issues by the LIGO-Virgo collaboration (LVC). Neutrinos are searched for, using a 1000-second time...
NEXT is a staged experimental program aiming at the detection of neutrinoless double beta (ββ0ν) decay in 136Xe using successive generations of high-pressure gaseous xenon time projection chambers. The collaboration is presently concluding four years of operation of NEXT-White, a radiopure 50-cm diameter and length TPC operated with enriched xenon at 10 bar, at the Laboratorio Subterràneo de...
The last decade of experimental data has provided many insights on the
most extreme phenomena in the Universe where gravity and particle
physics come together. A multi-messenger approach, combining data from
complementary experiments and exploiting the intimate connection
between ultra-high-energy cosmic rays, photons and neutrinos, is
needed to shed light on the still open crucial...
The constraints on invisible neutrino decay can come from future planned/proposed long baseline experiments - T2HK/T2HKK and ESS$\nu$SB. The T2HKK and ESS$\nu$SB experiments are both designed to have energy peak near the second-oscillation maximum of $P_{\mu e}$ while T2HK has the energy peak at the first oscillation maximum of $P_{\mu e}$. We perform a full three flavour study using matter...
Neutrinoless double beta decay (0νββ) is a hypothetical lepton number violating nuclear process which creates matter without a compensation of anti-matter. If observed, it would give an insight on why our universe is predominantly composed of matter. Furthermore, it would reveal the Majorana nature of neutrinos, namely that they are equal to their anti-matter counterpart, and possibly explain...
The Surface Detector (SD) of the Pierre Auger Observatory is used to search for ultra-high-energy (UHE) neutrinos with energies beyond 0.1 EeV of all flavours. They induce extensive air showers (EASs) that are efficiently detected and well distinguishable from those produced by UHE cosmic rays. This, along with the large aperture of the SD, leads to a UHE neutrino sensitivity competitive to...
We use perturbation theory to obtain neutrino oscillation probabilities, including the standard mass-mixing paradigm and non-standard neutrino interactions (NSI). The perturbation is made on the standard parameters ${\Delta}{m}_{21}^{2}/{\Delta}{m}_{31}^{2}$ and sin2(θ13) and on the non-diagonal NSI parameters, but keeps diagonal NSI parameters non-perturbated. We perform the calculation for...
Double beta decay is predicted in the Standard Model with the emission of two active neutrinos. Models in which light exotic fermions are emitted, replacing one or both the neutrinos in the final state, could be tested through the search for spectral distortions in the electron spectrum with respect to the Standard Model expectations. In this contribution the discovery potential of a selection...
The ANTARES neutrino telescope and its next-generation successor, KM3NeT, located in the abyss of the Mediterranean Sea, have been designed to study neutrinos from a variety of sources over a wide range of energies and baselines. One of the primary goals of the experiments is to determine the Earth matter effects stemming from the energy and zenith angle dependence of the atmospheric neutrinos...
The evolution of effective neutrino masses and mixing parameters in the ordinary matter can be characterized by a complete set of differential equations with respect to the matter parameter $a \equiv 2\sqrt{2}G^{}_{\rm F}N^{}_eE$, in analogy with the renormalization-group equations (RGEs) for running parameters. With some reasonable approximations, we find analytical solutions to the above...
Addressing the origin of the observed astrophysical neutrino flux is of paramount importance nowadays, since the sources generating such neutrinos still remain a mystery. Among the likely astrophysical sources of detectable high-energy neutrinos (e.g. blazars, supernova remnants etc.), also Gamma-Ray Bursts (GRBs) play a fundamental role, since they are among the few astrophysical sources...
It has been recently shown that the identification of the single positively-charged ion Ba2+ produced in double beta decay events in Xe-136 may be possible in a high-pressure gas TPC using molecular indicators. The NEXT collaboration is pursuing an intense R&D program geared towards a future detector able to detect “tag” the Ba2+ produced in such events, a technique that could lead to an...
The development of cryogenic calorimeters to search for neutrinoless double-beta decay (0$\nu$DBD) has given in the last years increasingly promising results. The possibility of achieving ton-scale exposures, maintaining an excellent energy-resolution, makes this kind of detector very suitable for a next-generation experiment.
In order to achieve a nearly background-free condition,...
In this work, we investigate the effects of non-unitary neutrino mixing on the determination of current unknown parameters in neutrino oscillation physics. From our analysis, we found that non-unitarity parameters in the 21 sector are sensitive to the NOνA experiment. However, it is observed that the NOνA experiment is not expected to improve the current knowledge of those parameters. We also...
In a recent time-integrated investigation of a catalog of 110 gamma-ray emitters, IceCube observed a cumulative neutrino excess in the flux produced during 10 years. Such an excess, incompatible with the background at the level of $3.3\sigma$, was mainly due to the starburst galaxy NCG 1068 and the BL Lacs TXS 0506+056, PKS 1424+240 and GB6 J1542+6129. Here we present the results of a...
Blazars are the most extreme subclass of active galactic nuclei with relativistic jets emerging from a super-massive black hole and forming a small angle with respect to our line of sight. Blazars are also known to be flaring sources: they exhibit large flux variations over a wide range in frequency and on multiple timescales, ranging from a few minutes to several months. Blazar flares have...
Two and three flavor oscillating neutrinos are shown to exhibit the properties bipartite and tripartite quantum entanglement [1]. Neutrino eigenstates are mapped to qubits used in quantum information theory. Such quantum bits of the neutrino state can be encoded on a IBMQ computer using quantum computing as a tool. We show the implementation of entanglement in the two neutrino system (in...
We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of non-standard interactions (NSIs). We derive approximate analytical expressions showing evolution of mass-mixing parameters in matter and in presence of NSIs. We observe that only the NSIs in (2,3) block ($\varepsilon_{\mu\mu}$, $\varepsilon_{\tau\tau}$, and $\varepsilon_{\mu\tau}$)...
Dark matter's existence (DM) has been well-established by repeated experiments over many length scales. Even though DM is expected to make up 85% of the current matter content of the Universe, its nature remains unknown. One broad class of corpuscular DM motivated by Standard Model (SM) extensions is weakly interacting massive particles (WIMPs). WIMPs generically have a non-zero cross-section...
I present dedicated studies and measurements aiming to the reduction of the $\gamma$ background in the $0\nu\beta\beta$ ROI for TeO$_{2}$ calorimeters. This is mainly due to 2615 keV $\gamma$'s scattering Compton with materials next to the detectors. It can be lowered by replacing the usual copper holders with organic compounds structures. TeO$_{2}$ crystals, positioned in a PMMA holder, have...
We propose a new approach to explore the neutral-current non-standard neutrino interactions (NSI) in atmospheric neutrino experiments using oscillation dips and valleys in reconstructed muon observables, at a detector like ICAL that can identify the muon charge. We focus on the flavor-changing NSI parameter $\varepsilon_{\mu\tau}$, which has the maximum impact on the muon survival probability...
In this controbution a combined measurement of the energy spectra of atmospheric electron and muon neutrinos in the energy range between 100 GeV and 50 TeV with the ANTARES neutrino telescope is presented. The analysis uses 3012 days of detector livetime in the period 2007–2017, and selects 1016 neutrinos interacting in (or close to) the instrumented volume of the detector, yielding...
The discovery of an astrophysical flux of high-energy neutrinos with IceCube is a milestone in the field of multi-messenger astronomy. Traditional time-integrated searches for point-like neutrino sources have so far been unsuccessful because of large backgrounds and weak neutrino signals. IceCube’s capability of observing the sky with full duty cycle enables us to search for transient neutrino...
In this talk, I will briefly describe the technique we developed to study the pile-up rejection capability of cryogenic bolometers. The precise characterization of the detector time resolution is indeed of crucial importance for next-generation cryogenic-bolometer experiments searching for neutrinoless double-beta decay, such as CUPID, in order to discriminate against the pile-up of...
Astrophysical neutrinos at hundreds of TeV are expected to originate in
hadronic interactions, but their sources are still unknown. The chance of
identifying the emitting objects can be improved by a rapid electromagnetic
follow-up of neutrino events. Here, the MAGIC telescopes play a relevant role in
identifying very high energy (>100 GeV) γ-ray counterparts. This is achieved...
MicroBooNE is a Liquid Argon Time Projection Chamber detector that has been taking data since 2015. One of its primary goals is to investigate the unexplained excess of electromagnetic events in the lowest energy ranges observed by the MiniBooNE experiment located along the same neutrino beamline. While one leading interpretation of this anomaly is electron neutrino appearance due to sterile...
The Giant Radio Array for Neutrino Detection (GRAND) is a proposed distributed observatory with a total area of 200,000 km2. This observatory will not only be sensitive to Ultra-High-Energy (UHE) neutrinos, but also to UHE photons and UHE cosmic rays; making it a multi-messenger observatory at the highest energies. In this contribution, the current status of the GRAND project will be...
The Large Enriched Germanium Experiment for Neutrinoless $\beta\beta$ Decay (LEGEND) program is a search for the neutrinoless double-beta decay of the $^{76}$Ge isotope. Its first phase, LEGEND-200, uses 200-kg of enriched high-purity germanium (HPGe) detectors in an active liquid argon shield and is currently under construction at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It...
The search for neutrino signals using a surface detector array is a challenging task that requires a very good control of the large background the from cosmic radiation. In this work we propose to use the HAWC observatory, an ~22000 m^2 water Cherenkov detector array located at 4100 m a.s.l., to search for neutrino induced muons produced within the largest volcano in Mexico, located in close...
The Majorana Demonstrator is searching for neutrinoless double beta decay ($0\nu\beta\beta$) in $^{76}$Ge, a beyond the standard model second order nuclear process whose discovery would indicate that the neutrino is a Majorana fermion. The experiment consists of a modular array of 44 kg of p-type point contact (PPC) high-purity germanium detectors (HPGe), 30 kg of which are enriched to 88% in...
MicroBooNE is an 85-ton active mass liquid argon time projection chamber (LArTPC) at Fermilab. Its excellent calorimetry and resolution, along with its exposure to two neutrino beamlines make it a powerful detector not just for neutrino physics, but also for Beyond the Standard Model (BSM) physics and astrophysics. The experiment has competitive sensitivity to Heavy Neutral Leptons arising in...
The search for neutrinoless double beta decay (NDBD) provides the most sensitive experimental test of lepton number conservation, as well as a powerful experimental probe of the nature and mass scale of the neutrino. In this talk, I will introduce the nEXO experiment: a proposed next-generation search for the neutrinoless double beta decay of $^{136}$Xe with a halflife sensitivity of...
Every time researchers have pushed the energy boundary in particle physics we have found something new about our Universe. Recently, IceCube has demonstrated that Neutrino Telescopes can use neutrinos from the cosmos as excellent tools to continue this exploration. The Pacific Ocean Neutrino Explorer (P-ONE) is a proposed initiative to construct one of the largest neutrino telescopes deep in...
Project 8 is a tritium endpoint neutrino mass experiment utilizing a phased program to achieve sensitivity to the range of neutrino masses allowed by the inverted mass ordering. The Cyclotron Radiation Emission Spectroscopy (CRES) technique is employed to measure the differential energy spectrum of relativistic decay electrons with high precision. In Phase II, the CRES technique was extended...
The Super-Kamiokande (SK) experiment is a 50 kton water-Cherenkov detector located in Kamioka, Japan. With its 40% photocoverage, it has been collecting data since 1996 and is responsible for the very first observation of neutrino oscillations through the analysis of atmospheric neutrinos. Nowadays, the atmospheric neutrinos measurements of the SK experiment keeps providing some of the most...
CUPID is a next-generation tonne-scale bolometric neutrinoless double
beta decay experiment to probe the Majorana nature of neutrinos and
discover Lepton Number Violation if the effective neutrino mass is
greater than 10 meV. CUPID will be built on experience, expertise and
lessons learned in CUORE, and will be installed in the current CUORE
infrastructure in the Gran Sasso underground...
The Jiangmen Undergrond Neutrino Observatory (JUNO) is an upcomming multipurpose experiment focused on resolving the neu- trino mass ordering, an open question of modern neutrino physics. With its 20-kton liquid scintillator target instrumented with 18000 20” PMTs and 25600 3” PMTs the JUNO detector will measure neu- trino spectrum from nuclear reactors at about 53 km distance with 3% energy...
The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a liquid scintillator detector with a primary goal to measure solar neutrinos. The sub-dominant $\textrm{CNO}$ cycle in the Sun is assumed to be the main energy production mechanism in heavier stars. The existence of this fusion process in Nature has been recently confirmed by Borexino (5$\sigma$ C.L.) for...
The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO's features make it an excellent experiment for $^8$B solar neutrino measurements, such as its low-energy threshold, its high energy resolution compared to water Cherenkov detectors, and its much large target mass compared to previous...
Hyper-Kamiokande is a future experiment in Japan to measure neutrino oscillations with beam and atmospheric neutrinos, to study astrophysical neutrinos, and to search for proton decay. It uses the well-established water Cherenkov detector technique, with improved photosensors and increased fiducial volume, relative to the current generation’s Super-Kamiokande detector. Combined with the...
I will report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. The analysis of the spectral shape of the spectrum near the endpoint leads to an improvement over the previous...
SoLid is a short baseline neutrino experiment at the BR2 reactor in Mol. It is searching for sterile neutrino oscillations and make precisions measurements of the neutrino energy spectrum from a highly enriched Uranium reactor core. The signature of neutrino reactions due to inverse beta decay is a coincidence of an electromagnetic energy deposition followed by the nuclear capture of a neutron...
The PIENU experiment was performed to measure the ${\pi}^+{\to}e^+{\nu}_e$ branching ratio with precision of $<0.1$% and search for rare pion decays. Recently many new and improved results of the rare decay searches involving heavy neutrinos ${\pi}^+{\to}l^+{\nu}_H(l=e,{\mu})$, weakly interacting neutral bosons ${\pi}^+{\to}l^+{\nu}X$, and three neutrinos...
The JSNS2 experiment aims to search for the existence of sterile neutrino at J-PARC. A 1 MW beam of 3 GeV protons incident on a spallation neutron target produces an intense neutrino beam from muon decay at rest. The experiment will search for muon anti-neutrino to electron anti-neutrino oscillations which are detected by the inverse beta decay (IBD) interaction, followed by gammas from...
Observation of geo-neutrinos originating from radioactive isotopes in the Earth (238U,232Th, etc.) can be converted to the amount of radioactive isotopes and the heat generated by their decays which governs the Earth dynamics.
KamLAND experiment achieved world's first observation of geo-neutrinos in 2005. Improvement of observation accuracy allowed us to reach the level where we can obtain...
Neutrino oscillation experiments aim to measure the neutrino oscillation parameters with accuracy and achieve a complete understanding of neutrino physics. The determination of the neutrino oscillation parameters depends on the knowledge of the neutrino energy, which is reconstructed based on the particles in the final state that emerge out of the nucleus after the neutrino-nucleus...
The IceCube Neutrino Observatory with its surface array IceTop enables multi-messenger astrophysics, detecting cosmic rays and neutrinos and searching for PeV gamma rays at a single location. IceTop will be upgraded in the coming years in order to improve its sensitivity and resolution. This surface enhancement will consist of 32 stations comprised of 8 scintillation panels and 3 radio...
The Pacific Ocean Neutrino Experiment (P-ONE) is a new initiative between Canadian and German groups that aims to construct a large volume neutrino telescope in the Northeast Pacific Ocean and, in this way, complement the sky coverage of the existing or under construction neutrino telescopes. As part of the NEPTUNE observatory, established by ONC, two pathfinders were built and deployed at the...
The FAMU (Fisica degli Atomi Muonici) experiment has the goal to measure precisely the proton Zemach radius, with incoming low energy muons. It will contribute to precision tests of QED and may contribute to shed more light on the so-called proton radius puzzle, by studying the electromagnetic structure of the proton and muon-nucleon interactions. To this aim, the FAMU experiment makes use...
The DUNE (Deep Underground Neutrino Experiment) is a proposed long-baseline
neutrino oscillation experiment located in the United States. The main physics objectives of DUNE are to characterize neutrino oscillations, search for nucleon decay, and observe supernova neutrino bursts. The DUNE far detector will be located 4850' underground at the Sanford Underground Research Facility in Lead,...
The neutrino detection require an associated lepton birth signal. Because of the weak interaction and because of the abundant cosmic ray noises, in last century huge undergroung detector were preferred for the single lepton traces. However highest energies leptons (above tens-hundred TeV), electron or tau secondaries, might produce in air huge airshowers: such a huge amplified signal, in...
Neutrinos have played a key role in astrophysics, from the characterization of nuclear fusion processes in the Sun to the observation of supernova SN1987A and multiple extragalactic events. The Super-Kamiokande experiment has played a major part in past in these astrophysical studies by investigating low energy O(10)~MeV neutrinos. It has notably been instrumental in characterizing the 8B...
Detecting ultrahigh-energy (UHE) neutrinos is a challenging task because fluxes are low, and the interaction cross-sections are minute. Motivated by the detection of high-energy neutrinos with IceCube, we are developing a compact Cherenkov telescope to detect Earth-skimming (UHE) neutrinos from a high-altitude balloon flight. The 1 m diameter Schmidt telescope has a 512-pixel...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton multi-purpose Liquid Scintillator (LS) detector currently being built in a dedicated underground laboratory in Jiangmen (PR China). JUNO’ s main physics goal is the determination of the neutrino mass ordering using electron anti-neutrinos from two nuclear power plants at a baseline of about 53 km. JUNO aims for an unprecedented...
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment located in Japan. One of the most challenging tasks of T2K is to identify whether CP is violated in the lepton sector, which T2K's recent results favour. By utilizing the near detector (ND280) data, T2K can constrain neutrino interaction and flux uncertainties by fitting a parametrised model to data. This allows a...
The Liquid Argon Time Projection Chamber (LArTPC) is increasingly becoming the chosen technology for both current and future precision neutrino oscillation experiments. One of the primary challenges in employing LArTPC technology is characterizing the performance of this technology and quantifying the associated systematic uncertainties. The MicroBooNE experiment plays a crucial role in...
Developed as NASA Astrophysics Probe-class mission, the Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to observe cosmic neutrinos and to identify the sources of ultra-high energy cosmic rays (UHECRs) with full-sky coverage for both of these extremely energetic messengers. POEMMA consists of two spacecraft flying in a loose formation at 525 km altitudes. Each spacecraft...
Cosmic-ray accelerators capable of reaching ultra-high energies are expected to also produce very-high energy neutrinos via hadronic interactions within the source. Many of the candidate astrophysical source classes are either transient in nature or exhibit flaring activity. Leveraging the Earth as a neutrino converter, the Probe of Extreme Multi-Messenger Astrophysics (POEMMA) will be able to...
Current neutrino detectors will observe hundreds to thousands of neutrinos from a Galactic supernovae, and future detectors will increase the yield by an order of magnitude or more. With such a data set there is potential for a huge increase in our understanding of the explosions of massive stars, nuclear physics under extreme conditions, and the properties of the neutrino. However there is a...
T2K (Tokai to Kamioka) is a Japan based long-baseline neutrino oscillation experiment designed to measure (anti-)neutrino flavor oscillations. A neutrino beam peaked around 0.6 GeV is produced in Tokai and directed toward the water Cherenkov detector Super-Kamiokande, which is located 295 km away. A complex of near detectors is located at 280 m and is used to constrain the flux and...
The recent detection of the coherent elastic neutrino-nucleus scattering (CEνNS )opens the possibil- ity to use neutrinos to explore physics beyond standard model with small size detectors. However, the CEνNS process generates signals at the few keV level, requiring of very sensitive detecting technologies for its detection.
The European Spallation Source (ESS) has been identified as an...
T2K (Tokai to Kamioka) is a Japan-based long-baseline neutrino oscillation experiment designed to measure (anti-)neutrino flavor oscillations. After the measurement of a non-zero value of the mixing angle $\theta_{13}$, T2K has started a campaign to measure the phase $\delta_{CP}$, an unknown element of the Pontecorvo-Maki-Nakagata-Sakata matrix, that can provide a test of the violation or...
A neutrino source based on decay of an intense muon beam would make an ideal source for measurement of neutrino oscillation parameters. Muon beams may be created through the decay of pions produced in the interaction of a proton beam with a target. The muons are subsequently accelerated and injected into a storage ring where they decay producing a beam of neutrinos. Cooling of the muon beam...
The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. This may point to a large population of faint, steady sources or flaring objects as origins of this flux. The most compelling evidence...
We present results of searches for light sterile neutrino oscillations at RENO. We have conducted a sub-ev scale sterile neutrino oscillation search using the RENO far and near detector data and an eV scale sterile neutrino oscillation search combining the RENO and NEOS data. The identical RENO near and far detectors are located at 294 m (near) and 1383 m (far), respectively, from the center...
The gamma-ray blazar TXS 0506+056 was discovered in very high energy (>100 GeV) gamma-rays by the MAGIC telescopes in 2017 in a coincidence with a high energy neutrino event IC-170922A. Subsequent multiwavelength (MWL) observations and theoretical modeling suggest that this source could be a cosmic ray and neutrino emitter. So far, this is the most significant association between a high-energy...
The existence of massive or massless weakly interacting neutral particles $X$ such as axion-like particles, sterile neutrinos, and Majorons has been suggested to augment the standard model with motivations that include providing dark matter candidates, explaining baryogenesis, and revealing the origin of neutrino masses. The three body pion decays ${\pi}^+{\to}l^+{\nu}X(l=e,{\mu})$ involving...
The 5 MW ESSnuSB proton beam represents an outstanding opportunity to create a sufficiently intense neutrino Super Beam to enable measurement of leptonic CP violation with a megaton water Cherenkov detector placed at the three time more distant second neutrino oscillation maximum, where the CP-violating term in the neutrino oscillation probability is significantly larger at the oscillation...
The IceCube Neutrino Observatory detects neutrinos by collecting the Cherenkov light created by their interaction products within one cubic km of ice. Neutrinos of a particular flavor produce corresponding charged leptons in charged current (CC) interactions. Each type of lepton can create a distinct light emission pattern in the detector. The hardest to observe is the pattern of the tau...
The detailed analysis of the results of the Neutrino-4 experiment obtained from the beginning of the experiment in 2016 to the present is presented. The analysis was carried out on all statistical material. The main task of the analysis performed is to identify possible systematic errors of the experiment. The result of analysis will be presented.
One of the crucial aspects to reach the aimed energy resolution of 3% @ 1 MeV in the JUNO experiment will be the instrumentation with and performance of the used photo sensors in the detector. Up to 20’000 20-inch photomultiplier tubes (PMTs) will be deployed in JUNO, of which each of them moreover has to fulfil dedicated quality requirements for several key characteristics (dark rate, PDE,...
Heavy Neutral Leptons (HNLs) can be abundantly produced in the sky when cosmic rays impact our atmosphere. In this talk, we present new constraints derived for the signal originating from the decay of these HNLs inside the volume of large Neutrino Telescopes such as IceCube and Super-Kamiokande.
The Online Scintillator Internal Radioactivity Investigation System (OSIRIS) is a 20-ton liquid scintillator detector currently under construction at the Jiangmen underground neutrino observatory (JUNO) in Kaiping, China. OSIRIS features 76 newly developed, intelligent PMTs (iPMTs) surrounding a cylindrical acrylic vessel embedded in a Cherenkov muon Veto. Its main purpose is the monitoring of...
ProtoDUNE Single-Phase (ProtoDUNE-SP) is a prototype of the first DUNE Far Detector module and was in operation at CERN from 2018-2020. As a liquid argon time projection chamber (TPC), ProtoDUNE-SP needs numerous calibration methods to measure the location of argon ionization and the precise number of electrons ionized. To aid in calibration, an array of scintillator strips covering the front...
While there is evidence for the existence of dark matter, its properties have yet to be discovered. Similarly, the nature of high-energy astrophysical neutrinos detected at the IceCube Neutrino Observatory remains unresolved. If dark matter and neutrinos are coupled to each other, they may exhibit a non-zero elastic scattering cross section. Such an interaction between an extragalactic...
Given the J-PARC program of upgrades of the beam intensity, the T2K collaboration is preparing towards an increase of the exposure aimed at establishing leptonic CP violation at 3 $\sigma$ level for a significant fraction of the possible $\delta_{CP}$ values. To reach this goal, an upgrade of the T2K near detector ND280 has been launched to reduce the overall statistical and systematic...
Long-duration gamma-ray bursts (GRBs) have been subject of investigation for a long time, being among the most mysterious and powerful transients occurring in our universe. In the attempt of explaining the observed electromagnetic GRB emission, various models have been proposed, even if an exhaustive theoretical explanation of the mechanism powering GRBs is still lacking. GRBs are also...
Detector systems fully or partially composed of solid polystyrene-based scintillator bars are used in many experiments. Given their wide variety of applications it is important to deepen our understanding of how scintillator performance changes with time. The long baseline neutrino experiment T2K (Tokai to Kamioka) has collected data since 2010. Most of the subsystems of the off-and on-axis...
The neutrino mass ordering (NMO) is one of the fundamental questions in neutrino physics. KM3NeT/ORCA and JUNO are two neutrino oscillation experiments both aiming at measuring the NMO with different approaches: ORCA with atmospheric neutrinos transversing matter/Earth and JUNO with reactor neutrinos. This talk presents the potential of determining the NMO through a combined analysis of JUNO...
Hyper-Kamiokande (HK) is the next generation large volume water Cherenkov detector under construction in Japan. Its physics program includes nucleon decay, neutrinos from astronomical and accelerator, with the main focus to determine the leptonic CP violation, with a fiducial volume, that is 8 times larger than its precursor Super-Kamiokande (SK).
To detect the weak Cherenkov light generated...
Blazars whose low-energy spectral component peaks above ~0.4 keV are thought to be efficient particle accelerators and are known as extreme blazars. They are particularly interesting for high-energy astrophysics, as they may be the counterparts of very high-energy gamma-ray sources and high-energy astrophysical neutrinos. 3HSP J095507.9+355101 is the first extreme blazar to be possibly...
The DARWIN observatory is a future dark matter detector containing 40 tons of liquid xenon in an active volume of a dual-phase time projection chamber. An ultra low intrinsic radioactivity, large mass, low threshold and good energy resolution make DARWIN a suitable tool to perform a wide range of neutrino physics measurements. Natural xenon contains approximately 9% of ${}^{136}$Xe that is...
When the 5 MW, 2.5 GeV, 1.3 ms proton pulses hit the ESSnuSB neutrino target there will be a copious production of not only neutrinos but also of muons. These muons could be used for precise neutrino cross-section measurements and sterile neutrino searches in a low energy nuSTORM facility and for high precision PMNS parameter measurements in a Neutrino Factory. An overview will be given of the...
The Deep Underground Neutrino Experiment (DUNE) is a cutting-edge experiment for
neutrino science and proton decay studies. The single-phase liquid argon prototype detector at CERN (ProtoDUNE-SP) is a crucial milestone for DUNE that will inform the construction and operation of the first and possibly subsequent 17-kt DUNE far detector modules. Michel electrons are distributed uniformly inside...
Acceleration of cosmic rays in hot and magnetized coronae of active galactic nuclei will lead to the production of high-energy neutrinos and soft gamma rays. These optically thick environments, hidden in gamma-rays, are the promising environment for producing the flux of high-energy cosmic neutrinos at medium energies. In this talk, we present the high-energy cosmic neutrinos flux from the...
The intense beam of muon and electron neutrinos with precisely known energy distributions provided by the stored-muon facility (nuSTORM) shall allow for a rich physics program with considerable impact in our understanding of fundamental properties of neutrinos and their interactions. In particular, the precision goals of the oscillation program can only be achieved with a realistic modeling of...
I discuss the potential of current and future liquid scintillator neutrino detectors of $\mathcal O (10)$ kt mass to localize a presupernova neutrino signal in the sky. In the hours preceding the core collapse of a nearby star (at distance $D$ less than 1 kpc), tens to hundreds of inverse beta decay events will be recorded, and their reconstructed topology in the detector can be used to...
RES-NOVA is a new proposed experiment for the hunt of neutrinos from core-collapse supernovae (SN) via coherent elastic neutrino-nucleus scattering (CEvNS) using an array of archaeological Pb-based cryogenic detectors. The high CEvNS cross-section on Pb and the ultra-high radiopurity of archaeological Pb enable the operation of a high statistics experiment equally sensitive to all neutrino...
Annihilation of Weakly Interacting Massive Particles (WIMPs) in the center of the sun($\odot$), earth($\oplus$) and the galaxy can give rise to neutrino-antineutrino pairs as their final products. We look at the prospects of detecting such neutrinos at the proposed 50-kt Iron Calorimeter (ICAL) detector, to be housed at the upcoming India-Based Neutrino Observatory (INO), wherein the...
The Double Chooz (DC) multi-detector experiment is one of the reactor experiment measuring the ultimate θ13 mixing parameter exploiting one of the most powerful Nuclear Reactor in Europe, the EDF Chooz NPP located within the the LNCA underground laboratory facility in France. Due to the delay of the near detector and the shallow overburden, DC was forced to develop several novel techniques for...
The Taishan Antineutrino Observatory (JUNO-TAO) is a satellite experiment of the JUNO detector. TAO consists of a ton-level liquid scintillator (LS) detector placed at ∼30 meters from a reactor core of the Taishan Nuclear Power Plant in Guangdong, China.
The main purposes of TAO are to provide a reference antineutrino spectrum for JUNO, removing possible model dependencies in the...
Dark photon is a well-motivated hypothetical particle introduced to explain BSM hints revealed in several independent experiments. A 3 kton-scale neutrino detector to be proposed in Yemilab, currently under construction in Korea can shed light on dark photon search using 100 MeV electron beam striking on a thick tungsten target. Best direct search sensitivity is expected for dark photons with...
In our arXiv:2008.11280 (under publication), we demonstrate that the combined sensitivity of JUNO with NOvA and T2K experiments has the potential to become the first fully resolved (≥5σ) measurement of neutrino Mass Ordering (MO) tightly linked to the JUNO schedule. In the absence of any concrete MO theoretical prediction and given its intrinsic binary MO outcome, we thus highlight the...
What if the dark matter content of the universe was made up of sterile neutrinos with a mass of the order of keV?
Currently, constraints from the measured relic abundance of dark matter and from observations in the X-ray band threaten the possibility of finding in terrestrial experiments a signal of such sterile neutrinos produced through oscillation and collisions in the early universe....
The purpose of the JSNS2 experiment is to search for sterile neutrinos with Δm2 near 1eV2. A 3 GeV J-PARC proton beam incident on a mercury target produces an intense neutrino beam from muon decay at rest which oscillates to anti-electron neutrinos. The JSNS2 detector is located at 24 m baseline from the target. The detector has a fiducial volume of 17 tons filled with GdLS, that efficiently...
Liquid Argon Time Projection Chambers (LArTPCs) are an important technology in the field of experimental neutrino physics due to their exceptional calorimetric and position resolution capabilities. In particular, their ability to distinguish electrons from photons is crucial for current and future neutrino oscillation experiments. The MicroBooNE experiment is utilizing LArTPC technology to...
The precision measurement of neutrino parameters can be achieved by studying $\nu _\mu \to \nu_e$ oscillations over a large $L/E$ range. In the context of long baseline neutrino experiments (with fixed $L$), this amounts to examining oscillations over a wide energy range. Most of the current and future long baseline experiments such as Deep Underground neutrino experiment (DUNE) are mainly...
The J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS2) experiment has started the search for neutrino oscillations with ∆m2 ~ 1 eV2 from anti-muon neutrino to Anti-electron neutron detected via the inverse beta decay (IBD) reaction which is tagged via gammas from neutron capture on Gadolinium. A 3 GeV 1 MW proton beam incident on a mercury target at the MLF at...
The ND-GAr, or Near-Detector gaseous argon detector, is one of the proposed components of the future DUNE near detector complex. It has been designed to achieve low detection thresholds and high acceptance. The ND-GAr characteristics make it an optimal detector to study neutrino interactions which is crucial for measuring leptonic CP violation. In this talk the physics potential of the ND-GAr...
Long-baseline neutrino experiments using megaton scale water Cerenkov far detectors can accumulate very large neutrino samples - $\mathcal{O}(10^3) \nu_e
\rm{/ year}$ - even with moderate beam intensity - $\mathcal{O}(100)$kW. The
presentation will show that at these intensities it is possible to instrument the beam with charged particle silicon pixel trackers to reconstruct precisely the...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator experiment currently under construction in the vicinity of the Pearl River Delta in Southern China. Its main focus lies on the determination of the Neutrino Mass Ordering via measuring the oscillated spectrum of electron anti-neutrinos from two nuclear power plants in 53 km distance each. JUNO requires to...
According to the baseline design of the 5 MW accelerator under construction in Lund, Sweden, its duty cycle will be only 4%, which leaves room for increasing the beam power and duty cycle to 10 MW and 8%, respectively. The linac power upgrade will be realized by increasing the linac pulse frequency from 14 to 28 Hz. The ESS linac pulse is 3 ms long which is too long for the cosmic ray-related...
The observation of 236 MeV muon neutrinos from kaon-decay-at-rest (KDAR)
originating in the core of the Sun would provide a unique signature of dark matter annihilation.
Since excellent angle and energy reconstruction are necessary to detect this monoenergetic,
directional neutrino flux, DUNE with its vast volume and reconstruction capabilities, is a promising
candidate for a KDAR neutrino...
For 25 years Super-Kamiokande has been exploring neutrinos from a variety of sources: the sun, supernovae, the Earth's atmosphere, dark matter annihilation, and cosmic origins
leading to many discoveries about neutrinos as well as those sources. Last Summer, the first stage of dissolving 0.1% Gd ions began resulting in increased sensitivity to detect neutrons enhancing Super-Kamiokande’s...
